-----------
PART
1 - ENGINE
SYSTEMS
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The
engine overhaul procedure initially
de
- 5. Oil pan and gasket.
scribes the assembly process for rebuilding
an engine using all new components. Follow-
ing this section are defined headings which
describe detailed repair specifications and
procedures, where components are suitable
tor
re-use.
Where overhaul
of
components is required
without engine being removed from the trac-
tor
refer to the following headings and the
relevant paragraphs in the main overhaul
procedure.
Operations
or
repairs that can be
performed with the engine still· In
the
tractor.
1. Cylinder head and associated inlet and
exhaust components.
2. Fuel injection pump and related parts.
3. Water pump, thermostat and associated
components.
4. Oil pump relief valve.
6.
Turbocharger.
Operations
or
repairs that can
be
performed with
the
engine separated from
the front axle.
1. Front timing cover/timing
gear
removal.
2. Oil pan removal
tor
access to crankshaft
and balancer, bearing shells, piston re-
moval
and
oil pump suction tubing.
3. Front pulley and damper assembly.
Operations
or
repairs that can
be
performed with
the
engine separated
from
the transmission housing
and
with oil pan
removed.
1. Crankshaft rear oil seal and carrier re-
moval (with oil pan removed).
2. Oil pump and drive
gear
removal.
B.
FAULT
FINDING
IMPORT
ANT: When effecting a repair the
cause
of
the problem
must
be
investigated
and
corrected to
avoid
repeat failures.
The following table lists problems and their
possible causes with recommended remedial
action.
PROBLEM
Engine
does
not-
develop
full
power
POSSIBLE
CAUSES
REMEDY
1. Clogged
air
cleaner 1 . Clean
or
renew element
2. Fuel line obstructed 2. Clean
3. Faulty injectors
3. Clean and reset
4. Incorrect valve lash 4. Check and reset
adjustment
5. Burnt, worn
or
sticking
valves
6. Blown head gasket
7. Incorrect fuel delivery
5. Replace valves with new
or
oversize and/or machine
the valve guide bores
6. Check head flatness and fit
new gasket
7. Check injectors and
pump
8. Low cylinder compression 8. Renew piston rings
or
re-bore/re-sleeve
as
necessary
4
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